The British and American Steam Navigation Company was a steamship line that operated a regular transatlantic service from 1839 to 1841. Before its first purpose-built Atlantic liner, British Queen was completed, British and American chartered Sirius for two voyages in 1838 to beat the Great Western Steamship Company into service. B & A's regular liners were larger than their rivals, but were underpowered. The company collapsed when its second vessel, President was lost in 1841.[1]